Improvement in boiler-furnaces



W. AYRES. v Boiler Furnaces.

Patented March 5, I878.

WITNESSES Kw 4w W mag;

ATTORNEY Nv PETERS, PNOTO-LITHDGRAPHER. WASNXNGTON, D G.

UNITED [STATES/PATENT OFFICE.

WILLIAM AYRES, 0F sr. PETERS, PENNSYLVANIA.

.IMPROVEMENTIN BOILER-FURNACES.

Specification forming part of Letters lfatent No. 200,815, dated March 5, 1878; application filed September 16, 1876.

To all whom it may concern:

.Be it known that I, WILLIAM AYRES, of St. Peters, in the county of Chester and State of Pennsylvania, have invented a new and valuf able Improvement in Boiler-Furnaces; and I ters and figures of reference marked thereon.

Figure 1 of the drawings is arepresentation of a Vertical transverse section of this invention, taken through the hearth. Fig. 2 is a vertical longitudinal section of the same.

This invention has relation to steam-boiler furnaces; and it consists in the construction and novel arrangement of the transverselycurved end extension of the boiler over and forming the crown of the brick-furnace, and supported by the side walls thereof; as hereinafter shown and described.

The object of this invention is to provide a furnace in which the boiler is so placed that the heat of the furnace-fire will be utilized in the generation of the steam required. The heat from charcoal andblast does not extend I far from the fire, and in order to obtain the full effect it is necessary to bring the boiler as close to the fire as possible.

In the accompanying drawings, the letter A designates the boiler, which is usually built at about the level of the top of the furnace; and B represents the extension thereof over the furnace, forming its top. 0 designates the furnace, which may be built in the ordinary manner, of suitable brick, with the front chamber or hearth 'D, in which the :bloom is made, and a raised ledge, E, having a side opening, I, for access into the rear of the furnace. The

tuyere through which the blast is introduced into the hearth is indicated at G. The pitch of the hearth-plates and the arrangement of the tuyere vary, as is Well known. B H in-' dicate the side walls of the hearth, which are extended up to form supports for the extension B of the boiler. K designates the head of the body of the boiler, and 00V indicatesthe mouths of the boiler-tubes extending through the same. This plate or head K does not extend to the top of the boiler, but is connected with the lower plate b of the extension, which is preferably made in concave or arched form, springing from the side walls H of the hearth. The upper plate 0 of the boiler-extension is also arched, being convex exteriorly.

As usually constructed, the extension is designed to have a greater span from side to side than the cylindrical portion of the boiler, and the form of its upper plate is preferably semi cylindrical. Shoulder-plates are employed, when the boiler is constructed in this manner, to connect the end of the cylinderbody with that of the extension.

L indicates the steam-drum, which extends upward from the upper plate of the extension B. M represents the smoke-stack, at the rear of the boiler. Through the front wall d of the furnace extend the gage-cocks e.

In the, construction of the extension B, it is designed to bring its sides down to about the level of the boiler center or axis, and they may be brought lower if thought advisable.

By the construction above described, a forgefire is provided inside the fire-box of the boiler, which, in this case, becomes the hearth.

Such a steam-boiler furnace is thought to be capable of producing sufficient steam to do all the work required in driving its own hammer and blowing machinery.

The boiler furnace above described is adapted to the smelting and puddling of iron and other purposes.

What I claim as my invention, and desire to secure by Letters Patent, is

The combination, in a steam-boiler furnace, of the boiler A, having the partial flue-head K, and above this the transversely-concave end extension B, forming the crown of the furnacechamber, and resting upon the side walls H of the same, the front combustionchamber 0, and the rear chamber F of said furnace, as specified.

In testimony that I claim the above I have hereunto subscribed my name in the presence of two witnesses.

WILLIAM AYRES. Witnesses HENRY AYRES, SIMON SHAFFER. 

